Cov khoom siv hlau xws li ferrosilicon, silicomanganese thiab ferromanganese tuaj yeem siv los ua deoxidizers kom tshem tawm cov pa oxygen ntau dhau hauv cov hlau molten.
Tab sis thaum nws los txog qhov twg yog qhov zoo tshaj plaws, cov lus nug nyuaj teb.
Cov txheej txheem deoxidation, muab tso rau hauv bluntly, yog siv qee cov ntaub ntawv alloy uas yooj yim rau kev hnov mob nrog oxygen molecules los tsim oxides uas yooj yim los nag lossis muaj cov ntsiab lus melting ntau dua, yog li txo cov ntsiab lus ntawm oxygen molecules hauv cov hlau molten.
Deoxidation yuav tsum tau ntxiv cov ntsiab lus uas ua ke nrog oxygen thiab yooj yim tshem tawm ntawm cov hlau molten rau hauv lub slag. Raws li kev khi lub zog ntawm ntau yam hauv cov hlau molten rau oxygen, qhov kev txiav txim los ntawm qaug zog mus rau lub zog yog raws li nram no: chromium, manganese, carbon, silicon, vanadium, titanium, boron, txhuas, zirconium, thiab calcium. Yog li ntawd, hlau alloys muaj li ntawm silicon, manganese, txhuas thiab calcium feem ntau yog siv rau steelmaking deoxidation.
Cia peb saib seb yuav ua li cas deoxidizers deoxidize
Vim muaj kev sib raug zoo ntawm silicon thiab oxygen, thaum ferrosilicon ntxiv rau steelmaking, cov tshuaj tiv thaiv deoxidation hauv qab no tshwm sim:
2FeO+Si=2Fe+SiO₂
Silica yog cov khoom ntawm deoxidation. Nws yog sib dua li molten steel. Nws ntab saum npoo ntawm cov hlau thiab nkag mus rau hauv slag, yog li tshem tawm cov pa oxygen hauv cov hlau. Nws tuaj yeem txhim kho lub zog, hardness thiab elasticity ntawm cov hlau, ua kom cov hlau nplaum permeability ntawm cov hlau, thiab txo qhov kub ntawm transformer. Hysteresis poob hauv steel.
Cov pa oxygen hauv cov hlau molten yog qhov tseeb FeO, uas yog tsim los ntawm cov tshuaj tiv thaiv ntawm liab-kub Fe thiab ntshiab oxygen ntawm qhov kub thiab txias.
Tom qab ntxiv silicon-manganese alloy rau cov hlau molten, Si + 2FeO=SiO2 + 2Fe Mn + 2FeO=MnO2 + 2Fe
Lub generated SiO2 thiab MnO2 react nrog CaO los tsim slag thiab raug tshem tawm, yog li ua tiav lub hom phiaj ntawm deoxidation.
Tsis tas li ntawd, ntxiv silicon-manganese alloy kuj tseem muaj cov txiaj ntsig ntawm kev kho cov ntsiab lus ntawm cov hlau, uas yog, kho cov ntsiab lus ntawm silicon thiab manganese hauv cov hlau.
Silicon thiab manganese nyob rau hauv silicomanganese alloys muaj zog affinity nrog oxygen. Thaum silicomanganese alloys siv rau hauv steelmaking, cov khoom deoxidation MnSiO3 thiab MnSiO4 ua yaj ntawm 1270 degree thiab 1327 degree feem. Lawv muaj cov ntsiab lus melting tsawg, cov khoom loj, thiab yooj yim rau ntab. , zoo deoxidation nyhuv thiab lwm yam zoo.
Raws li cov xwm txheej zoo ib yam, siv manganese lossis silicon ib leeg rau kev deoxidation, qhov kub ntawm qhov poob yog 46% thiab 37% feem, thaum siv silicon-manganese alloy rau deoxidation, qhov kub poob yog 29%.
Manganese yog cov hlau uas muaj zog heev, thiab nws cov khoom siv tshuaj muaj zog ntau dua li hlau. Thaum manganese ntxiv rau cov hlau molten, nws tuaj yeem hnov mob nrog FeO los tsim cov oxide slag uas yog insoluble hauv cov hlau molten, ntab saum npoo ntawm cov hlau molten, txo cov pa oxygen hauv cov hlau. FeO + Mn → Fe + MnO Lub peev xwm deoxidizing ntawm manganese hauv molten steel yuav tsum tau hais tias yuav tsum tsis tshua muaj piv nrog lwm cov ntsiab lus (xws li calcium, aluminium, silicon), tab sis vim nws yooj yim los tsim thiab tus nqi kuj tsawg. , nws tseem nrov ntawm cov tuam txhab steel. Tshwj xeeb tshaj yog rau kev ua boiling hlau, kev siv ferromanganese alloy rau deoxidation yog ib qho zoo tagnrho deoxidizer. Vim tias lub peev xwm deoxidizing ntawm manganese tsis muaj zog, ferromanganese alloy tuaj yeem kho cov ntsiab lus oxygen ntawm cov hlau yam tsis muaj deoxidizing nws. Ntau dhau mus boil. Nyob rau tib lub sijhawm, muaj manganese tuaj yeem txhim kho lub peev xwm deoxidation ntawm silicon thiab txhuas, vim tias cov khoom deoxidation MnO thiab lwm yam oxides (xws li Si02) tuaj yeem tsim cov ntsiab lus melting tsawg, uas muaj txiaj ntsig zoo kom tshem tawm ntawm cov hlau molten. .
Txawm hais tias cov txheej txheem deoxidation ntawm cov saum toj no peb steelmaking deoxidizers zoo ib yam, vim muaj qhov sib txawv ntawm cov hlau sib xyaw thiab cov ntsiab lus, cov ntsiab lus ntawm qee cov ntsiab lus muaj txiaj ntsig hauv cov hlau molten yog sib txawv, uas tuaj yeem nkag siab tias cov hlau tsim txawv thiab muaj qhov sib txawv. khoom.
Yog li ntawd, hauv kuv tus kheej lub tswv yim, kuv tsis tuaj yeem qhia qhov twg deoxidizer zoo dua, tab sis txiav txim siab uas deoxidizer zoo dua raws li cov khoom ntawm cov hlau ua.
